US10592740B2 - Control system, information processing device, control method, and program - Google Patents

Control system, information processing device, control method, and program Download PDF

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US10592740B2
US10592740B2 US15/519,568 US201515519568A US10592740B2 US 10592740 B2 US10592740 B2 US 10592740B2 US 201515519568 A US201515519568 A US 201515519568A US 10592740 B2 US10592740 B2 US 10592740B2
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pupil size
control
eye
section
iris
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US20170255823A1 (en
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Takashi Abe
Takeo Tsukamoto
Shuichi Konami
Tomoyuki Ito
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Sony Corp
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Sony Corp
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/18—Eye characteristics, e.g. of the iris
    • G06V40/197—Matching; Classification
    • G06K9/00617—
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/11—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils
    • A61B3/112—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils for measuring diameter of pupils
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1075—Measuring physical dimensions, e.g. size of the entire body or parts thereof for measuring dimensions by non-invasive methods, e.g. for determining thickness of tissue layer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1079—Measuring physical dimensions, e.g. size of the entire body or parts thereof using optical or photographic means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/6803—Head-worn items, e.g. helmets, masks, headphones or goggles
    • G06K9/00604—
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/18—Eye characteristics, e.g. of the iris
    • G06V40/19—Sensors therefor

Definitions

  • the present disclosure relates to a control system, an information processing device, a control method, and a program.
  • Patent Literature 1 therefore proposes an iris authentication system that uses the features of the irises.
  • Patent Literature 2 discloses a method of generating an iris code for a method of analyzing such features of the iris. Specifically, an iris in a captured image is recognized, the inner border of the iris (circular border between the iris and the pupil) and the outer border of the iris are decided, and the circular iris is separated.
  • a polar coordinate system is then set on the separated iris image.
  • the origin of the coordinate system is placed at the center of the circular border between the iris and the pupil.
  • the feature value of the iris image subjected to the polar coordinate conversion is extracted, and an iris code having a fixed length and a universal format for all irises is generated.
  • the iris code generated in this way is stored as a reference code.
  • an iris code similarly encoded is compared with the reference code stored in advance, and it is determined whether the iris code and the reference code originate from the same individual.
  • Patent Literature 3 proposes a system that varies the pupil of an eye in size by gently varying the intensity of illumination over time, and continuously captures eye images in which the pupil is different in size.
  • Patent Literature 4 has the imaging direction agree with the optical axis of the illumination, thereby preventing a bright spot from hiding the iris.
  • Patent Literature 1 JP 5-84166B
  • Patent Literature 2 JP 3307936B
  • Patent Literature 3 JP 2000-194855A
  • Patent Literature 4 JP 4527088B
  • Patent Literature 4 requires a camera to be disposed right in front of an eye, which problematically interferes with the field of view.
  • the present disclosure proposes a control system, an information processing device, a control method, and a program capable of capturing a clear iris image having no reflected light of illumination without interfering with a user's field of view.
  • a control system including: an illumination section configured to irradiate any one of left and right eyes with light; an imaging section configured to image the other eye different from the one of the left and right eyes; and a control section configured to perform control to cause the imaging section to image the other eye while the illumination section is irradiating the one of the left and right eyes with light.
  • an information processing device including: an imaging section configured to image any one of left and right eyes; an illumination section configured to irradiate the other eye different from the one of the left and right eyes with light; and a control section configured to perform control to cause the imaging section to image the one of the left and right eyes while the illumination section is irradiating the other eye with light.
  • a control method including: performing control to cause, while an illumination section is irradiating any one of left and right eyes with light, an imaging section to image the other eye different from the one of the left and right eyes.
  • FIG. 1 is a diagram that describes an overview of an information processing system according to an embodiment of the present disclosure.
  • FIG. 2 is a diagram that describes a captured image of an iris imaged by a traditional technique.
  • FIG. 3 is a diagram that describes a captured image of an iris imaged by a technique according to the present embodiment.
  • FIG. 4 is a block diagram illustrating an example of a configuration of the information processing device according to the present embodiment.
  • FIG. 5 is a flowchart illustrating an iris code registration process according to the present embodiment.
  • FIG. 6 is a flowchart illustrating an iris authentication process according to the present embodiment.
  • FIG. 7 is a diagram that describes an information processing device according to a modification of the present embodiment.
  • the information processing system according to the present embodiment may be, for example, an information processing device 1 that is realized by a glasses-type wearable device (SmartEyeglass).
  • a glasses-type wearable device SmartEyeglass
  • the information processing device 1 includes a right-eye lens section 2 R and a left-eye lens section 2 L which are respectively positioned in front of the right eye of a user and the left eye of the user when the information processing device 1 is worn by the user.
  • the edge of the right-eye lens section 2 R is provided with an illumination section 16 that irradiates the right eye with light
  • the edge of the left-eye lens section 2 L is provided with an imaging section 10 that images the left eye.
  • the positions for installing the illumination section 16 and the imaging section 10 are not limited to the example illustrated in FIG. 1 .
  • the illumination section 16 only has to be provided to irradiate any one of the left and right eyes with light.
  • the imaging section 10 only has to be provided to image the other eye different from the eye illuminated by the illumination section 16 .
  • the eye is traditionally illuminated and the size of the pupil is adjusted as a general method. This is because the pupil respectively constricts and dilates as a physiological response when illuminated with increased light and decreased light.
  • FIG. 2 is a diagram that describes a captured image of an iris imaged by a traditional technique.
  • an illumination section 160 traditionally illuminates an eye 3 with light to adjust the size of a pupil 31
  • an imaging section 100 images the eye 3 .
  • a captured image 40 that the light from the illumination is reflected by the cornea in front of the iris 30 and appears in the image as a bright spot 33 . If the bright spot 33 overlies the iris 30 , part of the feature information of the iris 30 lacks. This adversely affects the authentication rate of iris authentication very much.
  • a system that uses the consensual light reflex, and images, while illuminating one of the eyes to adjust the size of the pupil, the other eye not illuminated, thereby acquiring a clear iris image without being affected by the reflected light of the illumination.
  • this stimulus reaches the pretectal nucleus through the optic nerve, and relayed by the Edinger-Westphal (E-W) nucleus via the interneuron to the parasympathetic fiber of the oculomotor nerve. Further, the left and right pretectal nuclei are connected to each other via the posterior commissure.
  • E-W Edinger-Westphal
  • signals from one of the optic nerves are transmitted to both pretectal nuclei, and the pupils of both eyes constrict even in a case where only one of the eyes is illuminated with light.
  • This constriction of a pupil that is not illuminated with light is generally referred to as consensual light reflex.
  • FIG. 3 is a diagram that describes a captured image of an iris imaged by a technique according to the present embodiment.
  • the imaging section 100 images the right eye 3 R. Imaging the eye that is not illuminated makes it possible to acquire a clear image of the iris 30 without being affected by the reflected light of the illumination as illustrated as a captured image 42 .
  • FIG. 1 illustrates that the information processing device 1 is realized by a glasses-type wearable device (SmartEyeglass), the present disclosure is not limited thereto.
  • the information processing device 1 may also be realized by a pair of goggles, a pair of binoculars, a full face helmet, a hat with a brim, a sun visor, or the like.
  • the various kinds of setting of the pair of binoculars can be customized for an individual on the basis of the personal authentication using the iris.
  • the information processing device 1 may be installed to allow a user to look into like a binocular stereo-microscope, or fixed, for example, by being embedded in the wall.
  • FIG. 4 is a block diagram illustrating an example of the configuration of the information processing device 1 according to the present embodiment.
  • the information processing device 1 includes the imaging section 10 , an image acquisition section 11 , a pupil size detection section 12 , a pupil size comparison section 13 , an iris code storage section 14 , an illumination control section 15 , the illumination section 16 , an imaging control section 17 , an iris recognition section 18 , and an iris authentication section 19 .
  • the imaging section 10 is a device that images an eye of a user.
  • the imaging section 10 is inwardly provided to the edge of the lens section to image any one of the left and right eyes of the user when the information processing device 1 is worn by the user.
  • the image acquisition section 11 acquires an image of the eye imaged by the imaging section 10 .
  • the pupil size detection section 12 detects the pupil size from the image of the eye acquired by the image acquisition section 11 . Specifically, for example, the image of the eye is analyzed, the pupil border is decided, and the size thereof (pupil diameter) is detected.
  • the pupil size comparison section 13 determines whether the pupil size detected by the pupil size detection section 12 is a target pupil size.
  • the target pupil size is a default registration pupil size for iris registration. Further, the target pupil size is a registered pupil size for iris authentication. The registered pupil size is acquired from the iris code storage section 14 .
  • the iris code storage section 14 stores a registered iris code, the pupil size at the time of acquiring the iris code, and a user ID in association with each other.
  • the illumination control section 15 controls the illumination section 16 on the basis of a result of the comparison made by the pupil size comparison section 13 .
  • the illumination section 16 irradiates an eye of the user with light to adjust the size of the pupil.
  • the illumination control section 15 turns on/off the illumination section 16 , or adjusts the illuminance (turns up/down the illuminance).
  • the pupil respectively constricts and dilates as a physiological response when illuminated with increased light and decreased light. Accordingly, in a case where the detected pupil size is greater than the target pupil size, the illumination control section 15 performs control to turn up the illuminance. In a case where the detected pupil size is less than the target pupil size, the illumination control section 15 performs control to turn down the illuminance.
  • the illumination section 16 is a device that irradiates an eye of a user with visible light.
  • the illumination section 16 is realized, for example, by a light emitting diode (LED).
  • LED light emitting diode
  • the illumination section 16 is inwardly provided to the edge of the lens section to illuminate any one of the left and right eyes of the user when the information processing device 1 is worn by the user. Further, the illumination section 16 illuminates the other eye different from an eye imaged by the imaging section 10 .
  • the imaging control section 17 controls the imaging of the imaging section 10 .
  • the imaging control section 17 performs control to capture an image again. Further, the imaging control section 17 performs control to capture an image while the illumination control section 15 is irradiating an eye with light.
  • the iris recognition section 18 recognizes the iris from the image of the eye acquired by the image acquisition section 11 . Specifically, the iris recognition section 18 can decide the inner border of the iris (circular border between the iris and the pupil) and the outer border of the iris from the image of the eye, separate the circular iris, extract a feature value by performing polar coordinate conversion on the separated iris image, and generate an iris code through a predetermined encoding process. In a case where the pupil size comparison section 13 determines that the detected pupil size is the target pupil size, the iris recognition section 18 then outputs an iris code generated from the iris image at that time to the iris code storage section 14 at the time of iris registration. Further, in a case where the pupil size comparison section 13 determines that the detected pupil size is the target pupil size, the iris recognition section 18 outputs an iris code generated from the iris image at that time to the iris authentication section 19 at the time of iris authentication.
  • the iris authentication section 19 compares the iris code output from the iris recognition section 18 with the iris code registered in advance in the iris code storage section 14 to authenticate whether the output iris code and the iris code registered in advance originate from the same individual.
  • the configuration of the information processing device 1 according to the present embodiment has been described above.
  • the above-described information processing device 1 includes a microcomputer equipped with a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and a non-volatile memory.
  • the microcomputer controls each component of the information processing device 1 .
  • components other than the imaging section 10 and the illumination section 16 may be provided to a separate device (such as a smartphone) from the glasses-type wearable device, and the separate device and the glasses-type wearable device may transmit and receive data through wireless/wired communication, thereby performing illumination control and imaging control, and acquiring a captured image.
  • a separate device such as a smartphone
  • FIG. 5 is a flowchart illustrating an iris code registration process according to the present embodiment.
  • the illumination control section 15 first performs control to turn off the illumination of the illumination section 16 .
  • the registration process begins with the illumination off as an example in the present embodiment.
  • step S 106 the imaging control section 17 performs control to cause the imaging section 10 to image an iris.
  • step S 109 the pupil size detection section 12 then detects the pupil size on the basis of the captured image of the iris imaged by the imaging section 10 and acquired by the image acquisition section 11 .
  • the pupil size comparison section 13 checks whether the pupil size detected by the pupil size detection section 12 is the target pupil size.
  • the pupil size comparison section 13 checks whether the detected pupil size is a pupil size that is, for example, predefined and appropriate for iris authentication.
  • the illumination control section 15 determines in step S 115 whether the current illuminance is a maximum illuminance.
  • the illumination control section 15 performs control to turn on the illumination or turn up the illuminance (increase the intensity of the illumination) in step S 118 .
  • the maximum illuminance is a preset limit illuminance of the illumination section 16 .
  • the limit illuminance of the illumination section 16 is set on the basis of a predetermined standard (value at which the human body is not harmed) with respect to the intensity of light with which the human eyes are irradiated.
  • the pupil size detected by the pupil size detection section 12 and the iris code recognized and generated by the iris recognition section 18 are stored in the iris code storage section 14 in step S 121 .
  • the user ID is also stored. In this way, the iris code is registered.
  • step S 124 it is then determined whether iris codes are stored (acquired) a target number of times. Storing iris codes based on different pupil sizes makes it possible to improve the accuracy of iris authentication.
  • the illumination control section 15 determines whether the current illuminance is the maximum illuminance (S 115 ). If the current illuminance is not the maximum illuminance, the illuminance of the illumination section 16 is turned up (S 118 ), and an iris code is acquired again (S 106 ⁇ S 121 ).
  • the iris code registration process according to the present embodiment has been specifically described above. Next, an iris authentication process according to the present embodiment will be described with reference to FIG. 6 .
  • FIG. 6 is a flowchart illustrating the iris authentication process according to the present embodiment. As illustrated in FIG. 6 , in step S 203 , the illumination control section 15 first performs control to turn off the illumination of the illumination section 16 .
  • step S 206 the imaging control section 17 performs control to cause the imaging section 10 to image an iris.
  • step S 209 the pupil size detection section 12 then detects the pupil size on the basis of the captured image of the iris imaged by the imaging section 10 and acquired by the image acquisition section 11 .
  • step S 212 the pupil size comparison section 13 compares the pupil size detected by the pupil size detection section 12 with the registered pupil size, and sets a pupil size appropriate for authentication as the target pupil size.
  • the illumination control section 15 turns on the illumination or performs illuminance control (turns up/down the illuminance) control in step S 218 . That is, the illumination control section 15 adjusts the intensity of the illumination to approximate the pupil size to the target pupil size.
  • the iris authentication section 19 performs iris authentication in step S 221 . That is, the iris authentication section 19 compares the iris code generated by the iris recognition section 18 on the basis of the iris image of the agreeing pupil size with the iris code that is stored in the iris code storage section 14 and has a pupil size which agrees to some extent, and authenticates whether the generated iris code and the stored iris code originate from the same individual.
  • the iris authentication section 19 may authenticate an iris code for one or each of pupil sizes.
  • the illumination section 16 can adjust not only the magnitude of the intensity of the illumination, but also the amount of light with which an eye is irradiated, by controlling, in a case where a lens section of the glasses-type wearable device includes a light-blocking filter, the light-blocking filter.
  • the illumination control section 15 can adjust the overall illuminance on the basis of the number of illumination sections 16 that are turned on and the intensity of the illumination of each illumination section 16 .
  • the imaging control section 17 may also perform control to capture an image in cooperation with the illumination control section 15 .
  • the imaging control section 17 captures an image a predetermined time after the start of the illumination. This is because, in a case where the human eye is irradiated with light, the light reflex that the pupil of the eye varies and the consensual light reflex (the pupil that is not irradiated with light similarly varies) take the predetermined time.
  • the information processing device 1 described with reference to FIG. 1 includes the illumination section 16 and the imaging section 10 that are disposed to irradiate any one of the left and right eyes with light, and to image the other eye.
  • the present disclosure is not, however, limited thereto.
  • FIG. 7 is a diagram that describes an information processing device 1 ′ according to a modification of the present embodiment.
  • the information processing device 1 ′ is realized by a glasses-type wearable device similarly to the information processing device 1 illustrated in FIG. 1 , and includes the right-eye lens section 2 R and the left-eye lens section 2 L that are respectively positioned in front of the right eye of a user and the left eye of the user when worn by the user.
  • Illumination sections 16 R and 16 L are respectively provided to the edge of the right-eye lens section 2 R and the edge of the left-eye lens section 2 L in the present modification.
  • imaging sections 10 R and 10 L are respectively provided to the edge of the right-eye lens section 2 R and the edge of the left-eye lens section 2 L.
  • Such a structure allows the information processing device 1 ′ to acquire a clear iris image of any of the right eye and the left eye. That is, in a case where an iris image of the right eye is acquired, the information processing device 1 ′ has the illumination section 16 L on the edge of the left-eye lens section 2 L irradiate the left eye, and has the imaging section 10 R on the edge of the right-eye lens section 2 R image the right eye. Further, in a case where an iris image of the left eye is acquired, the information processing device 1 ′ has the illumination section 16 R on the edge of the right-eye lens section 2 R irradiate the right eye, and has the imaging section 10 L on the edge of the left-eye lens section 2 L image the left eye.
  • the information processing device 1 ′ allows the iris codes of both eyes to be registered and authenticated.
  • the information processing system can capture a clear iris image having no reflected light of illumination without interfering with a user's field of view. This makes it possible to eliminate the necessity to capture an iris image again at the time of iris code registration because of an unclear iris image, and further improve the accuracy of authentication at the time of authentication.
  • the information processing device 1 illustrated in FIG. 1 includes the imaging section 10 and the illumination section 16 that are integrated with each other.
  • the imaging section 10 and the illumination section 16 may also be, however, provided to separate devices.
  • the information processing system may be a system in which the imaging section 10 is provided to a monocular wearable device, and the illumination section 16 is provided to an installed/fixed device. In this case, the illumination section 16 irradiates one of the eyes of a user with light from a super-directive spot light, and the other eye is imaged by the imaging section 10 of the monocular wearable device.
  • the information processing system may be a system in which the imaging section 10 and the illumination section 16 are separately provided to wearable devices (such as a SmartBand, a SmartWatch, or a SmartEyeglass), smartphones, or the like worn by a user.
  • imaging sections 10 L and 10 R, and the illumination section 16 L and 16 R of the information processing device 1 ′ illustrated in FIG. 7 are provided to the same device.
  • the imaging section 10 L and the illumination section 16 L, and the imaging section 10 R and the illumination section 16 R may also be provided to separate devices.
  • present technology may also be configured as below.
  • a control system including:
  • an illumination section configured to irradiate any one of left and right eyes with light
  • an imaging section configured to image the other eye different from the one of the left and right eyes
  • control section configured to perform control to cause the imaging section to image the other eye while the illumination section is irradiating the one of the left and right eyes with light.
  • control system further including:
  • an iris recognition section configured to recognize an iris image from a captured image by the imaging section.
  • control system according to (2) further including:
  • a pupil size detection section configured to detect a size of a pupil recognized from the captured image
  • control section performs illumination control to acquire a target pupil size in accordance with the detected pupil size.
  • control section performs illumination control to turn up an illuminance.
  • control section performs illumination control to turn down an illuminance.
  • control section performs control to store an iris code based on the recognized iris image, a pupil size at time of recognizing the iris image, and a user ID in association with each other.
  • control system according to any one of (2) to (6), further including:
  • an iris authentication section configured to perform iris authentication on the basis of the recognized iris image.
  • control section performs control to begin to capture an image with illumination of the illumination section off.
  • An information processing device including:
  • an imaging section configured to image any one of left and right eyes
  • an illumination section configured to irradiate the other eye different from the one of the left and right eyes with light
  • control section configured to perform control to cause the imaging section to image the one of the left and right eyes while the illumination section is irradiating the other eye with light.
  • a control method including:
  • control section configured to perform control to cause, while an illumination section is irradiating any one of left and right eyes with light, an imaging section to image the other eye different from the one of the left and right eyes.

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JP6819291B2 (ja) 2021-01-27
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EP3223232B1 (de) 2022-05-25
WO2016080031A1 (ja) 2016-05-26
EP3223232A4 (de) 2018-07-18

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